下面四种取用药品的操作中，正确的是（ ） A． B． C． D．

A video is very popular on the Internet these days. It’s South Korean star PSY’s Gangnam style 《江南style》 video. He stands above Justin Bieber and becomes the most popular singer on YouTube.

In fact, the video sets the Guinness World Record(吉尼斯世界记录)in YouTube history. Gangnam Style was put onto the Internet on July 15，2012.What’s catching the eyes in Gangnam style is PSY’s special dance moves, funny horse riding poses and dancing in a towel. Many people may not understand the Korean language, they are still interested in the video

The video also has many different versions now. The song has topped the iTunes charts(排行榜) in 31 countries, including the United States, United Kingdom, and Canada.

The song tells us the rich people’s lifestyle in today’s Gangnam Block, South Korea. Psy looks at here as Seoul’s Beverly Hills.(比弗利山庄)

小题1:Justin Biber is a ___________.

A．a singer

B．a teacher

C．a doctor

D．a swimmer小题2:What’s catching the eyes the Gangnanm style?                                              

A．His special voice

B．His fat body

C．His dance moves

D．His strange clothes小题3:The song tells us _______.

A．the way to live as the rich

B．the way to sing as the poor

C．the way to dance as the poor

D．the way to sleep as the rich

看图写话（满分5分）

请根据图画所给的情景及提示词，加上自己合理的想象，写出五句话，这五句话须写在答题卡各处。要求语句通顺，语法正确。

参考词汇：Saturday, wash, newspaper, drink, homework

使用显微镜观察标本时，由低倍物镜换成高倍物镜时，相应的变化是 [ ]

A．视野变得明亮         

B．细胞数目减少

C．要换用小光圈

D．调粗准焦螺旋使物像清晰

以下关于突触后抑制，说法错误的是（）。

A.一个兴奋性神经元不能直接引起突触后神经元抑制

B.突触后膜产生超极化变化

C.突触后膜产生部分去极化变化

D.可分为回返性抑制和传入性抑制两种

E.是由突触前末梢释放抑制性递质引起的

确定最佳现金持有量的存货模式考虑的成本包括机会成本和变动性转换成本。 ( )